Weight

Weight is the force of an object, caused by gravity. It is unlike mass, in that weight changes planet-to-planet, because the gravitational field strength changes - mass doesn't because it is a measure of matter, not force.

Equation

$$W = mg$$

Where:

• $W$ is the weight of the object, in Newtons (N)
• $m$ is the mass of the object, in kilograms (kg)
• $g$ is the gravitational field strength, in newtons per kilogram (N/kg)

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